A few things:
- Update the example driver in the documentation.
- We can drop the old kfree in drm_dev_release.
- Add a WARN_ON check in drm_dev_register to make sure everyone calls
drmm_add_final_kfree and there's no leaks.
v2: Restore the full cleanup, I accidentally left some moved code
behind when fixing the bisectability of the series.
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
---
drivers/gpu/drm/drm_drv.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 80cfd0f14475..1ee606b4a4f9 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -297,8 +297,6 @@ void drm_minor_release(struct drm_minor *minor)
*
* drm_mode_config_cleanup(drm);
* drm_dev_fini(drm);
- * kfree(priv->userspace_facing);
- * kfree(priv);
* }
*
* static struct drm_driver driver_drm_driver = {
@@ -326,10 +324,11 @@ void drm_minor_release(struct drm_minor *minor)
* kfree(drm);
* return ret;
* }
+ * drmm_add_final_kfree(drm, priv);
*
* drm_mode_config_init(drm);
*
- * priv->userspace_facing = kzalloc(..., GFP_KERNEL);
+ * priv->userspace_facing = drmm_kzalloc(..., GFP_KERNEL);
* if (!priv->userspace_facing)
* return -ENOMEM;
*
@@ -838,10 +837,7 @@ static void drm_dev_release(struct kref *ref)
drm_managed_release(dev);
- if (!dev->driver->release && !dev->managed.final_kfree) {
- WARN_ON(!list_empty(&dev->managed.resources));
- kfree(dev);
- } else if (dev->managed.final_kfree)
+ if (dev->managed.final_kfree)
kfree(dev->managed.final_kfree);
}
@@ -959,6 +955,8 @@ int drm_dev_register(struct drm_device *dev, unsigned long flags)
struct drm_driver *driver = dev->driver;
int ret;
+ WARN_ON(!dev->managed.final_kfree);
+
if (drm_dev_needs_global_mutex(dev))
mutex_lock(&drm_global_mutex);
--
2.24.1
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